First post, by Masejoer
I have a MV035 motherboard here (actually two, both behave the same) and can run cachechk (v4 2/7/96) on Intel and AMD CPUs (33-100MHz), but my Cyrix 486 DX4-100 and 5x86-100GP CPUs both stall out in cachechk when on line/Megabyte "3." Only a reboot gets the system responding again. I didn't find anything online about this, and apparently none of my other socket 3 boards support (won't even POST) these Cyrix processors. Is this my board causing this, or does this test not work on Cyrix chips? More below.
In additional notes, my ISA POST code card switches to "d2" when both of these Cyrix CPUs get to that point of the program. The other Intel and AMD CPUs show the same FF from the end of POST. Cachechk on both MV035 motherboards running non-Cyrix CPUs state that "it looks like megabyte #3 isn't being cached", the same line that the Cyrix CPUs get stuck on. Other than this 3rd Megabyte, It shows that cache is running fine. Same program output on both boards and different CPUs, re-using the RAM.
The motherboard is running with 4x16MB 30-pin SIMMS and 256KB of L2 cache.
Lastly, 3D bench stops rendering after a couple minutes on Cyrix, but loops forever with both the AMD and Intel chips. It seems like the Cyrix chips may be "unstable" once I get the HDD situation sorted. The 14 CPU and frequency Jumpers and two for Voltage are all set correctly, following https://stason.org/TULARC/pc/motherboards/D/D … -BUS-MV035.html
Any ideas or input on the Cyrix CPU behavior? I can't blame the CPUs now that I can see two different Cyrix chips behaving the same way.
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And for a question unrelated to the Cyrix - I also cannot get a CF adapter to work (no POST) via two different ISA controller cards when using this motherboard model, so right now my testing is from floppy boot...the system is a bit of a pain to use like this. I get one long and three short beeps after the IDE to CF adapter is hooked up to my controller card(s) and powered via floppy power plug. It's hooked up correctly - I've been using these adapters and controller cards in various boards since last year. My IDE to SATA adapters are packed away and I don't have any old, small IDE mechanical drives to hook up. I've changed the address jumpers on one controller with no luck, and the second one isn't configurable. A different videocard didn't change this behavior either (this is what one long, three short should be related to). Not sure what's up here, but perhaps someone has experienced similar no-POST after a CF adapter is attached to controller card.